中文摘要：

本文从理论和实验上对Cs39D态Rydberg原子在弱电场作用下的Stark效应做了详细研究.理论上利用数值方法计算了Cs原子39D态的Stark结构;实验上,采用两步激发超冷基态原子获得超冷Rydberg原子,通过场电离的方法获得了39D态的Stark光谱,测量获得α52/2,α50/2,α32/2和α30/2相应的极化率分别为：62（7）,-146（13）,73（6）和-106（20）MHz·V-2cm2,实验结果与理论相符合.

英文摘要：

In this paper,we investigate the Stark effect of ultra-cold 39D cesium Rydberg atoms in low-field.The Stark structure of 39D Rydberg states is calculated numerically.The cold cesium atoms are excited to Rydberg states via two-step process and the Stark spectra are obtained by field-ionization method.The scalar and tenson polarizabilities of 39D cesium Rydberg atoms are measured to be α52/2=62（7） MHz·V-2cm2,α50 /2=-146（13） MHz·V-2cm2,α23/2=73（6） MHz·V-2cm2,α03/2=-106（20） MHz·V-2cm2 respectively.The experimental values are in agreement with the theoretical results.